Wednesday’s shooting at the U.S. Immigration and Customs Enforcement facility in Dallas that left two detainees and the alleged shooter dead is just the latest in political and immigration-related violence this year.

The shooter's motives and targets are unclear, but Joe Rothrock, the special agent in charge of the Dallas FBI field office, said at a press conference Wednesday morning the agency is investigating the shooting as "an act of targeted violence." Investigators found bullet casings they said contained anti-ICE messages.

Meanwhile, the U.S. Department of Homeland Security confirmed two detainees were shot and one is in critical condition. No one from law enforcement was injured in the shooting, DHS said.

The fatal shooting comes amid President Donald Trump's immigration crac

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